arago spot meaning in Hindi

Examples

1. Beside the demonstration of wave-behavior, the Arago spot also has a few other applications.
2. The Arago spot is very sensitive to small-scale deviations from the ideal circular cross-section.
3. Furthermore, this means that the Arago spot is present even just a few obstacle diameters behind the disc.
4. For an ideal point source, the intensity of the Arago spot equals that of the undisturbed wave front.
5. In particular, if the object has an ellipsoidal cross-section the Arago spot has the shape of an evolute.
6. These assumptions have no obvious physical foundation but led to predictions that agreed with many experimental observations, including the Arago spot.
7. In astronomy, the Arago spot can also be observed in the strongly defocussed image of a star in a Newtonian telescope.
8. At the same time the intensity of the Arago spot is reduced with respect to the intensity of the undisturbed wave front.
9. The edge corrugation should not be much more than 10 % of this width to see a close to ideal Arago spot.
10. The zone plate's focusing ability is an extension of the Arago spot phenomenon caused by diffraction from an opaque disc.